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Zhen Zhao

31 accepted papers

2026

Are Tools Always Beneficial? Learning to Invoke Tools Adaptively for Dual-Mode Multimodal LLM Reasoning

ICML 2026poster

Tool-augmented reasoning has emerged as a promising direction for enhancing the reasoning capabilities of multimodal large language models (MLLMs). However, existing studies mainly focus on enabling models to perform tool invocation, while neglecting the necessity of invoking tools. We argue that to…

Cited by 0SourceScholar
2026

ArtVIP: Articulated Digital Assets of Visual Realism, Modular Interaction, and Physical Fidelity for Robot Learning

ICLR 2026poster

Robot learning increasingly relies on simulation to advance complex ability such as dexterous manipulations and precise interactions, necessitating high-quality digital assets to bridge the sim-to-real gap. However, existing open-source articulated object datasets for simulation are limited by insuf…

Cited by 0SourceScholar
2026

PD$^{2}$GS: Part-Level Decoupling and Continuous Deformation of Articulated Objects via Gaussian Splatting

ICLR 2026poster

Articulated objects are ubiquitous and important in robotics, AR/VR, and digital twins. Most self-supervised methods for articulated object modeling reconstruct discrete interaction states and relate them via cross-state geometric consistency, yielding representational fragmentation and drift that h…

Cited by 0SourceScholar
2026

XR-1: Towards Versatile Vision-Language-Action Models via Learning Unified Vision-Motion Representations

ICML 2026oral

Recent progress in large-scale robotic datasets and vision-language models (VLMs) has advanced research on vision-language-action (VLA) models. However, existing VLA models still face two fundamental challenges: (\textit{i}) producing precise low-level actions from high-dimensional observations, (\t…

Cited by 0SourcecodeScholar
2025

DiN: Diffusion Model for Robust Medical VQA with Semantic Noisy Labels

CVPR 2025poster

Medical Visual Question Answering (Med-VQA) systems benefit the interpretation of medical images containing critical clinical information. However, the challenge of noisy labels and limited high-quality datasets remains underexplored. To address this, we establish the first benchmark for noisy label…

2025

FreqPolicy: Efficient Flow-based Visuomotor Policy via Frequency Consistency

NeurIPS 2025poster

Generative modeling-based visuomotor policies have been widely adopted in robotic manipulation, attributed to their ability to model multimodal action distributions. However, the high inference cost of multi-step sampling limits its applicability in real-time robotic systems. Existing approaches acc…

Cited by 0SourceScholar
2025

Learning From Imperfect Demonstrations With Self-Supervision for Robotic Manipulation

ICRA 2025

Improving data utilization, especially for imperfect data from task failures, is crucial for robotic manipulation due to the challenging, time-consuming, and expensive data collection process in the real world. Current imitation learning (IL) typically discards imperfect data, focusing solely on suc

Cited by 7SourceScholar
2025

MTVQA: Benchmarking Multilingual Text-Centric Visual Question Answering

ACL 2025finding

Text-Centric Visual Question Answering (TEC-VQA) in its proper format not only facilitates human-machine interaction in text-centric visual environments but also serves as a de facto gold proxy to evaluate AI models in the domain of text-centric scene understanding. Nonetheless, most existing TEC-VQ…

2025

RoboMIND: Benchmark on Multi-embodiment Intelligence Normative Data for Robot Manipulation

RSS 2025poster

Developing robust and general-purpose manipulation policies is a key goal in robotics. To achieve effective generalization, it is essential to construct comprehensive datasets that encompass a large number of demonstration trajectories and diverse tasks. Unlike vision or language data, which can be…

Cited by 20PDFScholar
2025

TimeKAN: KAN-based Frequency Decomposition Learning Architecture for Long-term Time Series Forecasting

ICLR 2025poster

Real-world time series often have multiple frequency components that are intertwined with each other, making accurate time series forecasting challenging. Decomposing the mixed frequency components into multiple single frequency components is a natural choice. However, the information density of pat…

2024

DriveGPT4: Interpretable End-to-End Autonomous Driving Via Large Language Model

RA-L 2024

Multimodallarge language models (MLLMs) have emerged as a prominent area of interest within the research community, given their proficiency in handling and reasoning with non-textual data, including images and videos. This study seeks to extend the application of MLLMs to the realm of autonomous dri

Cited by 603SourceScholar
2024

Harmonizing Visual Text Comprehension and Generation

NeurIPS 2024poster

In this work, we present TextHarmony, a unified and versatile multimodal generative model proficient in comprehending and generating visual text. Simultaneously generating images and texts typically results in performance degradation due to the inherent inconsistency between vision and language moda…

2024

Progressive Classifier and Feature Extractor Adaptation for Unsupervised Domain Adaptation on Point Clouds

ECCV 2024poster

"Unsupervised domain adaptation (UDA) is a critical challenge in the field of point cloud analysis. Previous works tackle the problem either by feature extractor adaptation to enable a shared classifier to distinguish domain-invariant features, or by classifier adaptation to evolve the classifier to…

2024

Roll with the Punches: Expansion and Shrinkage of Soft Label Selection for Semi-supervised Fine-Grained Learning

AAAI 2024technical

While semi-supervised learning (SSL) has yielded promising results, the more realistic SSL scenario remains to be explored, in which the unlabeled data exhibits extremely high recognition difficulty, e.g., fine-grained visual classification in the context of SSL (SS-FGVC). The increased recognition…

2024

SM3: Self-supervised Multi-task Modeling with Multi-view 2D Images for Articulated Objects

ICRA 2024poster

Reconstructing real-world objects and estimating their movable joint structures are pivotal technologies within the field of robotics. Previous research has predominantly focused on supervised approaches, relying on annotated datasets to model articulated objects within limited categories. However,…

Cited by 1SourceScholar
2023

Augmentation Matters: A Simple-Yet-Effective Approach to Semi-Supervised Semantic Segmentation

CVPR 2023poster

Recent studies on semi-supervised semantic segmentation (SSS) have seen fast progress. Despite their promising performance, current state-of-the-art methods tend to increasingly complex designs at the cost of introducing more network components and additional training procedures. Differently, in thi…

2023

Beyond Attentive Tokens: Incorporating Token Importance and Diversity for Efficient Vision Transformers

CVPR 2023poster

Vision transformers have achieved significant improvements on various vision tasks but their quadratic interactions between tokens significantly reduce computational efficiency. Many pruning methods have been proposed to remove redundant tokens for efficient vision transformers recently. However, ex…

2023

Conflict-Based Cross-View Consistency for Semi-Supervised Semantic Segmentation

CVPR 2023poster

Semi-supervised semantic segmentation (SSS) has recently gained increasing research interest as it can reduce the requirement for large-scale fully-annotated training data. The current methods often suffer from the confirmation bias from the pseudo-labelling process, which can be alleviated by the c…

2023

Enhancing Sample Utilization through Sample Adaptive Augmentation in Semi-Supervised Learning

ICCV 2023oral

In semi-supervised learning, unlabeled samples can be utilized through augmentation and consistency regularization. However, we observed certain samples, even undergoing strong augmentation, are still correctly classified with high confidence, resulting in a loss close to zero. It indicates that the…

Cited by 11PDFcodeScholar
2023

Instance-Specific and Model-Adaptive Supervision for Semi-Supervised Semantic Segmentation

CVPR 2023poster

Recently, semi-supervised semantic segmentation has achieved promising performance with a small fraction of labeled data. However, most existing studies treat all unlabeled data equally and barely consider the differences and training difficulties among unlabeled instances. Differentiating unlabeled…

2023

Rethinking Gradient Projection Continual Learning: Stability / Plasticity Feature Space Decoupling

CVPR 2023poster

Continual learning aims to incrementally learn novel classes over time, while not forgetting the learned knowledge. Recent studies have found that learning would not forget if the updated gradient is orthogonal to the feature space. However, previous approaches require the gradient to be fully ortho…

Cited by 29SourcePDFScholar
2023

Shrinking Class Space for Enhanced Certainty in Semi-Supervised Learning

ICCV 2023poster

Semi-supervised learning is attracting blooming attention, due to its success in combining unlabeled data. To mitigate potentially incorrect pseudo labels, recent frameworks mostly set a fixed confidence threshold to discard uncertain samples. This practice ensures high-quality pseudo labels, but in…

Cited by 24PDFcodeScholar
2023

Task-Oriented Multi-Modal Mutual Leaning for Vision-Language Models

ICCV 2023poster

Prompt learning has become one of the most efficient paradigms for adapting large pre-trained vision-language models to downstream tasks. Current state-of-the-art methods, like CoOp and ProDA, tend to adopt soft prompts to learn an appropriate prompt for each specific task. Recent CoCoOp further boo…

Cited by 6PDFScholar
2023

Towards Semi-supervised Learning with Non-random Missing Labels

ICCV 2023poster

Semi-supervised learning (SSL) tackles the label missing problem by enabling the effective usage of unlabeled data. While existing SSL methods focus on the traditional setting, a practical and challenging scenario called label Missing Not At Random (MNAR) is usually ignored. In MNAR, the labeled and…

Cited by 18PDFcodeScholar
2022

DC-SSL: Addressing Mismatched Class Distribution in Semi-Supervised Learning

CVPR 2022poster

Consistency-based Semi-supervised learning (SSL) has achieved promising performance recently. However, the success largely depends on the assumption that the labeled and unlabeled data share an identical class distribution, which is hard to meet in real practice. The distribution mismatch between th…

Cited by 38PDFScholar
2022

Improving Barely Supervised Learning by Discriminating Unlabeled Samples with Super-Class

NeurIPS 2022accept

In semi-supervised learning (SSL), a common practice is to learn consistent information from unlabeled data and discriminative information from labeled data to ensure both the immutability and the separability of the classification model. Existing SSL methods suffer from failures in barely-superv…

Cited by 15SourcePDFScholar
2022

LaSSL: Label-Guided Self-Training for Semi-supervised Learning

AAAI 2022technical

The key to semi-supervised learning (SSL) is to explore adequate information to leverage the unlabeled data. Current dominant approaches aim to generate pseudo-labels on weakly augmented instances and train models on their corresponding strongly augmented variants with high-confidence results. Howev…